((PS: I don’t know ANYTHING about “South Park”, except for the games, so sorry if this was wrong, so feel free to edit this if you want))

You were the younger sibling to a 10 year old girl. That girl was named “Wendy Testaburger”, you were only born a year after her, but she’s still your big sister, she’s kind and she protects you from bullies (your in a grave below her), and she likes hanging out with you